That's why whenever I move to a new city, I typically look to live somewhere that's at the end of the metro line. It meant in the morning commute I can _always_ get a seat.
That was one of the reasons I liked living in Hammersmith when I worked in Shoreditch/Old Street - it's at the end of the Hammersmith and City Line and I don't have to change lines. There's also the add bonus that the line is above ground until Paddington which meant I have more than enough time to load up any tabs I need to use before the Internet blackout.
In Hong Kong I worked at Central and lived in Tsuen Wan. Literally from one end of the line to the other. This had the added bonus that I was also guaranteed a seat on the way home as well.